The ratio of the wavelengths of the first line of the Lyman series and the first line of the Balmer series of the hydrogen spectrum is:

The Bohr model is not applicable to which of the following?

How much work must be done to pull apart the electron and the proton that make up the Hydrogen atom, if the atom is initially in the state with $n = 2$

If the kinetic energy of an electron in a Bohr orbit of hydrogen is K, what is its potential energy?

The ratio of ionization energy of Bohr’s hydrogen atom and Bohr’s hydrogen like lithium atom is

Which of the following correctly relates the kinetic energy (K), potential energy (U), and total energy (E) of an electron in a Bohr orbit?

In hydrogen atom, when electron jumps from second to first orbit, then energy emitted is

As the electron in Bohr orbit of Hydrogen atom passes from state $n = 2$ to $n = 1$, the kinetic energy $K$ and potential energy $U$ change as

In Bohr’s model of hydrogen atom, let $PE$ represents potential energy and $TE$ the total energy. In going to a higher level

The radius of hydrogen atom in its ground state is $5.3\,\, imes \,\,{10^{ - 11}}\,\,m$. After collision with an electron it is found to have a radius of $21.2\,\, imes \,\,{10^{ - 11}}\,\,m$. What is the principal quantum number $n$ of the final state of the atom

In the lowest energy level of hydrogen atom, the electron has the angular momentum